Reservoir-valve



A. G. SHAVER.

RESERVOIR VALVE.

APPLICATION FILED APR. 25. 1919.

1,359,540. Patented NOV. 23, 1920.

UNITED STATES PATENT OFFICE.

ARCHIBALD G. SHAVER, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNEASSIGNMENTS, TO REGAN SAFETY DEVICES COMPANY, INC., A CORPORATION OF NEWYORK.

RESERVOIR-VALVE.

To all whom it may concern:

Be it known that I, ARCHIBVALD G. SHAVER, a' citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inReservoir-Valves, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to improvements in reservoir valves and isdesigned particularly for use in the train control systems as shown inmy co-pending applications, filed April 25, 1919, Serial'Nos. 292,545and 292,548, one object of the invention being the provision of a valvewhich is positive in its actions, which will move to the desiredposition by gravity in case of a failure of any of its parts, and whichwill absolutely prevent air from passing through the main reservoir tothe engineers brake valve under any abnormal condition.

A further object of this invention is the provision of a valve of thistype which is so designed as to be easily made and assembled and whichhas few parts to get out of order.

In the accompanying drawings is illustrated in section the completevalve in normal condition and asconnected to the piping.

Referring to the drawings, the numeral 1 designates the pipe leading tothe engineers brake valve, not shown, and connected to the main sections2, 3 and 4, through the normally closed valve A. Connected'by means ofthe members 5, 15 and 16, is the main valve-M, which is constructed soas to provide a chamber 6 having an outlet through the port 7 into thechamber 8 so that air may pass through the pipe 4 from the mainreservoir to the engineers brake valve. Y

The casing 17 of chamber 13 is internally threaded to receive thethreaded end of the coil carrying member 18, provided with a removablehead 19 so that the coil 20 and its armature 21 and stem 22 may beinserted, the stem 22 being adapted to project into the chamber 13 tocontrol the two valves C and D, the coil when energized, normallyholding the valve D closed so that air is permitted to pass through theport 9 into the by-pass 1O to the lower end of the chamber 11. Thiscauses the piston A to be elevated and the piston'E, mounted in thereduced end 12 of the chamber 11, is held upwardly so that the port 7 isopen. Upon the denergization' of Specification of Letters Patent.

Patented Nov. 23, 1920.

Application filed April 25, 1919. Serial No. 292,549.

the coil 20 the valves C and D reverse their position so that the airpressure will be upon the small piston E, moving the same downwardly sothat air is exhausted through the chamber 11, through the channel 10 andport 9, into the chamber 13 through the exhaust pipe 14, the valve Bseating'and closing the port 7, the spring I) assisting in thisoperation and assuring the closing of the valve B. The lower end of thechamber 11 is closed by means of the removable plug 23, while the valveguiding plugs 24 and 25 are also detachably connected to the valvecasing, these projecting into the chamber 6, It will be noted that allthe members are so constructed as to normally fall by gravity so thatany failure of air or electriclty will cause the valve B to be closed,while the failure of electricity alone will permit the valve B to beclosed and the valve C to be closed.

Also connected to the valve casing is a block 26 of insulation, forcarrying the conductors 27 and 28, which supply current to the coil 20.

It will be noted in this construction that the failure of either of theair or electrical current will permit the valve to operate by is a greatfeature in a device of this character. 1

ThiSg-Vfil-VG is designed for use in conjunction with em train controlsystem as heretofore mentioned and normally permits air to flow from themain reservoir to the engineers valve through the chamber 6 and to trapthe air in such chamber under abnormal conditionsor when the coil 20 isdeenergized and air is' cut off from the chamber 11.

What I claim as new is 1. A reservoir valve including a main casinghaving a main air inlet and a main air outlet port, said casing beingprovided with two chambers, one in communication with each of saidports, with a valve controlled port between the chambers, said casingbeing further provided with a double diametered piston chamber, a singlestem, two pistons of for holding the pistonnpwardly and its lid valveopen or for exhausting the air pressure to permit the first valve toclose.

a 2. A reservoir valve including a body having three main chambers, twoof said chambers being the entrance and exhaust chambers, and havinginterposed therebetween a valve controlled port, the remaining chamberbeing double diametered, two pistons ot' ditlterent diameters mountedtor sliding movement in said double diametered chamber, a valveconnected thereto tor controlling said port, said valve being held openby air pressure, said body being further provided with a port incommunication with the first chamber and the outside air, two valvesconnected for simultaneous movement for alternately opening oppositeends of said port,

a lay-pass leading from the lower end oi the double diametered chamberto said last meninmates tioned port, whereby air is supplied to or released from the chamber, and electrical means for actuating said lasttwo valves,

3. A. reservoir valve including a main casing having three mainchambers, two of said chambers being the entrance and exhaust chambersand having interposed therebetween a valve seated port, a piston mountedfor sliding movement in the remaining chamber, a valve connected to thepiston for controlling said port, said valve being held open by airpressure on said piston, and elec trically controlled means forcontrolling the supply of air to said piston when the valve is open andfor exhausting the air from below the piston to permit the closing ofthe valve.

lln testimon whereof I affix m si nature.

A ClllBAlLD G. @llil TER.

